DNA & Punnett Square
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| DNA--> Deoxy ribonucleic Acid | The carrier of genetically coded information found in the nucleus of nearly all living organisms as the main component of chromosomes.
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| Punnett Square | The diagram used by biologists to determine the probability of an offspring having a particular genotype.
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| Genotype | The actual lettered code assigned to DNA allele pairs passed from mother and father to offspring during reproduction.
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| Phenotype | The physical characteristics that organisms receive because of the gene type inherited from the parents.
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| Genetics | the study of genes, heredity, and genetic variation in living organisms
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| Heredity | The passing of characteristics from parents to children
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| Off Spring | A child or animal in relation to its parent or parents.
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| Allele | A gene pair (1 from mom and 1 from dad) that appear at a particular location on a particular chromosome and control the same characteristic.
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| Homozygous Dominant | A particular gene that has identical CAPITAL letter alleles on both homologous chromosomes. This gene’s traits will take over when placed in an allele pair HH
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| Homozygous Recessive | A particular gene that has identical lower case letters on both homologous chromosomes.--> hh
(This gene’s traits will be masked if it were to be linked to a capital letter)
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| Heterozygous | A particular gene that has received both a recessive and dominant trait Hh
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| Genetic Cross | The deliberate breeding of two different individuals that result in offspring that carry part of the genetic material of each parent.
a. Example Mendel’s long and short pea plant experiment
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| Monohybrid cross | Mating between two individuals with different alleles at one genetic trait of interest.
Rita and Fred Fish are concerned about the size of their potential children.
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| Gregor Mendel | An Austrian monk who discovered the basic principles of heredity through experiments on the tall and short pea plants in his garden.
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| Reginald Punnett | The British geneticist responsible for creating the 4 square chart that determines the future genotypes of offspring
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Created by:
hdambrosio
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